Last week start my two-week module on mathematical biology where I get to study travelling waves in-depth.  A travelling wave in biology is a phenomena that changes an “energy” through space and time.  You can think of it as ripples in a pond as the energy extends from the centre origin to the outer limits.  It is very useful in biology to model things like travelling waves, such as predator/prey models, the ripples on some myxobateria fruiting bodies, and the movement of pigment in mammalian eyes.  It is just one example of how you can find mathematics in biology and that makes it beautiful.